No, spacing is fine.

High light I've never associated with internodal spacing. Nor low light.

I've got some extremely wide ranging client tanks, going from 1.5 w/gal of NO FL's in a 28" deep tank to about 8-9w/gal in a 48" deep tank to a 4 w/gal in a 28" deep tank to 2.1 w/gal in 22" tank, to 5.5 w/gal in a 16" deep tank, to 2w/gal of NO FL'2 in a 16" tank.


Regards,
Tom Barr